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Comparison of Aerosol Single Scattering Albedo Derived from the Ozone Monitoring Instrument with Aerosol Robotic Network Observations

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Atmospheric and Oceanic Science Letters 2012年第3期5卷 264-269页

作者： LIU qi HONG Yu-lan School of Earth and Space Sciences University of Seience and Technology of China Hefei 230026 China

The single-scattering albedo （SSA）, which quantifies radiative absorption capability, is an important optical property of aerosols. Ground-based methods have been extensively exploited to determine aerosol SSA but there were no satellite-based SSA measurements available until the advent of advanced remote sensing techniques, such as the Ozone Monitoring Instrument （OMI）. Although the overall accuracy of OMI SSA is estimated to approach 0.1, its regional availability is unclear. Four-year SSA daily measurements from three Aerosol Robotic Network （AERONET） sites in China （Xianghe, Taihu, and Hong Kong） are chosen to determine the accuracy of OMI SSA in specific locations. The results show that on a global scale, the OMI SSA is systematically higher （with a mean relative bias of 3.5% and a RMS difference of ~0.06） and has poor correlation with the AERONET observations. In the Xianghe, Taihu, and Hong Kong sites, the correlation coefficients are 0.16, 0.47, and 0.44, respectively, suggesting that the distinct qualities of OMI SSA depend on geographic locations and/or dominant aerosol environments. The two types of SSA data yield the best agreement in Taihu and the worst in Hong Kong; the differing behavior is likely caused by varying levels of cloud contamination. The good consistency of the aerosol variation between the two SSA datasets on a seasonal scale is promising. These findings suggest that the current-version OMI SSA product can be applied to qualitatively characterize climatological variations of aerosol properties despite its limited accuracy as an instantaneous measurement.

关键词： aerosol single scatter albedo OMI AERONET

Effect of Microstructures on Elevated-Temperature Wear Resistance of a Hot Working Die Steel

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Journal of Iron and Steel Research International 2011年第10期18卷 47-53页

作者： WEI Min-xian WANG Shu-qi WANG lan CHEN Kang-min School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 Jiangsu China

Elevated-temperature wear tests under atmospheric conditions at 400 ℃ were performed for a hot working die steel H21 on a pin-on-disk wear tester. The phase and morphology of worn surfaces were examined using XRD and SEM, and the relation of wear resistance to tempered microstructures was studied for H21 steel. XRD patterns exhibit that oxidative wear is a predominated wear mechanism with Fe3O4 and Fe2O3 on worn surfaces. It is found that with increasing normal load, obvious plastic deformation of substrate appears on worn surfaces. Microstructures start to affect apparently wear resistance of the steel with an increase of load. Under loads of 50--100 N, wear losses of steel retain low values and relatively approach for steels with various microstructures. As loads are increased to 150--200 N, wear losses of steel start to increase obviously and present apparent difference for steel with various microstructures. Wear resistance is found to increase in the sequence as follows., tempered sorbite, tempered martensite, tempered troostite without secondary hardening and tempered troostite with secondary hardening or upcoming one. Higher strength and microstructural stability are required for steels with excellent wear resistance.

关键词： steel heat treatment microstructure wear wear resistance

Microscopic Characteristics of Damage Evolution in Ultrapure Aluminum under Tensile Loading

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Chinese Physics Letters 2011年第1期28卷 153-155页

作者： qi Mei-lan ZHONG Sheng FAN Duan LUO Chao HE Hong-Liang School of Science Wuhan University of Technology Wuhan 430070 Laboratory for Shock Wave and Detonation Physics Research Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900

A series of plate-experiments are carried out to acquire ultrapure aluminum （purity,. 99.999%） samples with damage. Based on the metallographic of all ＂soft-recovered＂ samples, the characteristics of damage evolution and spallation damage mechanism in ultrapure aluminum are analyzed in detail. Results show that the damage will increase regularly with increasing loading＂ strength. Most of voids appear in the grain boundary and grow alone under tensile loading＂ before they coalesce each other to form big irregular voids. These analysis results are helpful to understand the evolution process of ductile metal dynamic fracture and establish the damage evolution model.

关键词： Condensed matter: structural mechanical & thermal

RFPRODUCTION OF HIGH DENSITY F_(2)^(+) CENTERS IN UNDOPED AND DOPED SODIUM FLUOWE CRYSTALS

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Chinese Physics Letters 1990年第1期7卷 20-23页

作者： GU Hongen qi lan Department of Physics Tianjin UniversityTianjin 300072 Department of Water Resources and Harbour Engineering Tianjin UniversityTianjin 300072

F_(2) centers in colored undoped and doped NaF crystals can be converted nearly completely into F_(2)^(+) centers with the high density of more than 10^(17)cm^(-3) by irradiating the crystals with a 505nm laser at room temperature.A process of conversion from F_(2)^(+) to (F_(2)^(+))^(*) centers in the NaF crystals doped with divalent metal ions such as Mn^(++),Mg^(++) and Ni^(++) after the 505nm laser irradiation was observed in our experiments.

关键词： temperature. centers colored

Strong Converse Inequality for the Meyer-Knig and Zeller-Durrmeyer Operators

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Communications in Mathematical Research 2012年第1期28卷 1-9页

作者： qi qiU-lan LIU JUAN College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 No.1 Middle Shcool of Handan Handan Hebei 056002

In this paper we give a strong converse inequality of type B in terms of unified K-functional Kλα （f, t2）（0 ≤λ≤ 1, 0 〈 α 〈 2） for the Meyer-Knig and Zeller-Durrmeyer type operators.

关键词： Meyer-Konig and Zeller-Durrmeyer type operator moduli of smooth-ness,K-functional strong converse inequality HOder's inequality

Isolation and Structure Elucidation of an Antifungal Antibiotics A73 Produced by a Soil Fungus Strain No.131

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Chemical Research in Chinese Universities 1999年第1期15卷 85-88页

作者： YANG Jun qi Xiu-lan SHAO Gang YAO Xin-sheng Susumu Kitanaka Department of Natural Products Chemistry Department of Microbiology Shenyang Pharmaceutical UniversityShenyang110015 Department of Pharmacognosy College of PharmacyNihon UniversityJapan Chiba274

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关键词： Antifungal antibiotics Isolation Structure elucidation A73

Bis-cyclometalated Ir(Ⅲ)Complex-Based Electrogenerated Chemiluminescence Sensor Array for Discriminating Three Biothiols

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Journal of Analysis and Testing 2020年第2期4卷 114-121页

作者： Xiao-Ru Liu Man-Ping qian Hong-lan qi Cheng-Xiao Zhang Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710062People’s Republic of China

A simple and sensitive electrogenerated chemiluminescence(ECL)sensor array was developed for the discrimination of three biothiols,including homocysteine(Hcy),cysteine(Cys)and glutathione(GSH)using two bis-cyclometalated Ir(Ⅲ)complexes as ECL *** aldehyde groups bearing bis-cyclometalated Ir(Ⅲ)complexes were selected as ECL probes,including[(bt)2Ir(phen-CHO)]PF_(6)(bt=2-phenylbenzothiazole,phen-CHO=1,10-phenanthroline-5-carboxaldehyde,probe 1)and[(ppy)_(2)Ir(phen-CHO)]PF_(6)(ppy=2-phenylpyridine,probe 2).A“signal on”ECL method was proposed for biothiols assay based on the increase in ECL intensity of two ECL probes by *** biothiols can be detected with detection limits of 0.8,0.7 and 0.8μM by probe 1 and 0.3,0.4 and 0.5μM by probe 2 for Cys,Hcy and GSH,***-element sensor array was assembled for the detection of three biothiols due to the different enhancement effects of biothiols on the ECL intensity of two ECL *** ECL sensor array combining with the principal component analysis was applied to discriminate three *** study demonstrates that the ECL sensor array using dual ECL reagents provides a promis-ing way for the discrimination of multiple biothiols with good sensitivity and simpleness.

关键词： ECL Sensor array Biothiols Ir(Ⅲ)complex Principal component analysis

Vericiguat treatment of heart failure: A systematic review and metaanalysis

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World Journal of Clinical Cases 2023年第35期11卷 8330-8342页

作者： Heng Yang Chao Luo Wan-qi lan Yan-Hua Tang Department of Cardiovascular Surgery The Second Affiliated Hospital of Nanchang UniversityNanchang 330008Jiangxi ProvinceChina

BACKGROUND Heart failure(HF),an end-stage manifestation of various cardiac diseases,poses an enormous economic and health burden on *** may be an effective drug in the treatment of *** To explore by meta-analysis the efficacy and safety of Vericiguat in treating chronic heart *** Databases,including PubMed,EMBASE,Web of Science,and Cochrane Library,were searched to collect all published randomized controlled trials(RCTs)on Vericiguat treatment of chronic heart failure from the earliest electronic records to those published in March *** investigators independently screened the literature according to inclusion and exclusion criteria,evaluated the quality of the studies,and extracted valid data before conducting a meta-analysis using *** Four RCTs with 5919 patients were included,and the meta-analysis showed that treatment with 10 mg Vericiguat reduced the incidence of the primary endpoint(a composite of cardiovascular mortality and first heart-failure-related hospital-ization)in patients with chronic heart failure compared to placebo[relative risk(RR)=0.91,95%confidence interval(CI):0.85–0.98,P=0.01],and reduced the incidence of heart-failure-related hospitalization(RR=0.92,95%CI:0.84–1.00,P=0.05).However,for the incidence of cardiovascular and all-cause death,there were no significant differences between the Vericiguat and placebo *** addition,the two groups did not show significant differences in blood pressure,heart rate,and Kansas Cardiomyopathy Questionnaire physical limitation *** terms of safety,10 mg Vericiguat did not increase the risk of adverse effects in patients with chronic heart *** may increase the risk of symp-tomatic hypotension(RR=1.17,95%CI:0.98–1.39,P=0.08)and syncope(RR=1.18,95%CI:0.90–1.55,P=0.24),but not *** Vericiguat(10 mg)was more effective than placebo in treating patients with chronic heart failure and had a better safety profile.

关键词： Vericiguat Chronic heart failure Randomized controlled trials Meta analysis

PHOTOIONIZATION AND TUNABLE LASER OF COLOR CENTERS IN KMgF_(3)

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Chinese Physics Letters 1990年第6期7卷 276-279页

作者： GU Hongen qi lan RUAN Yongfeng Department of Physics Tianjin UniversityTianjin 300072 Department of Water Resources and Harbour Engineering Tianjin UniversityTianjin 300072

The density of 570nm centers in KMgF_(3) crystals colored by electron beam bombardment at 200K could be increased by irradiating the crystals with 337nm,400nm,and 445nm lasers at room temperature or 200K,*** near infrared laser operation using 570nm centers in KMgF_(3) crystals was realized at room *** tunable range of the laser is from 720nm to 820nm.

关键词： temperature laser tunable